Ejector for presses.



M. W. OBRIBN.

HECTOR FOR PRESSES.

APPLICATION FILED DEG. 24, 1913.

1,093,200. Patented Apr. 14, 1914.

llnwcen'ntmnr 8 M i WWI/311% TED STATES EJECTOR FOR PRESSES.

To all whom it may concern Be it known that I, MIOI-IAEL W. OBRIEN, acitizen of the United States, and resident of Rochester, in the countyof Monroe and State of New York, have invented certain new and usefulImprovements in Ejectors for Presses, of which the following is aspecification.

This invention relates to presses of the type in which blanks, such astop-lifts for heels, are compressed within a die which has openings atits opposite faces, so that a blank may be ejected from the die by meansof an ejector passing through the die.

The object of the invention is to produce an ejector, of simpleconstruction, which will remove a blank from the die with certainty andwithout any danger of the blank falling back into or upon the die afterit has been ejected therefrom. To this end I employ, in addition to theusual member for engaging a blank and discharging it from the die, amember which operates, in conjunction with the first mentioned member,to grip the blank during the ejecting operation, and to release it onlyafter it has been carried to a point where it cannot fall back into orupon the die.

In the accompanying drawings :-Figure 1 is a rear-elevation of a machineembodying the present invention; Fig. 2 is a planview of a part of themachine, showing particularly the ejector-mechanism; Fig. 3 is a Fig. 2,but on a larger scale; and Figs. 4 and 5 are similar to Fig. 3, exceptthat they show the parts in different operative position.

In United States Letters Patent No. 1,034,493, granted to me August 6,1912, a blank-pressing machine is disclosed in which an ejector isemployed,this ejector operating through the die and accordingly I haveillustrated the present invention as applied to a machine of the typedisclosed in that patent, and since the machine is fully; disclosedtherein its general construction and operation are not particularlydescribed in this application. As shown in 1, the machine comprisespressing-instrumentalities including a plunger 10 reciprocated byeccentric connections with a power-shaft 11. The blanks 12, which inthis case are toplifts for heels, are compressed in dies 14, which areintermittently rotated, in a horizontal plane, by means of a carrier 15actu- Specification of Letters Patent.

Application filed. December 24, 1913.

Patented Apr. 14, 1%14.

Serial No. 808,575.

ated by a vertical shaft 16 suitably connected with the power-shaft 11.The dies 14 are annular in form, as shown in Figs. 3, 4 and 5, beingopen at their upper and lower faces to facilitate the admission anddischarge of the blanks in the same manner as in the said patent.

As in the machine of the patent, the ejec tor is actuated by ahorizontal rockshaft 17, journaled on the frame of the machine, thisshaft being oscillated intermittently by connections with thepower-shaft 11, including an eccentric-strap 18, a segmental gear 19which is rocked thereby, and a pinion 20 on the end of the rock-shaft17. The oscillations of the rock-shaft thus occur in timed cooperationwith the intermittent movements of the dies 14.

The ejector-mechanism comprises two members which are hereinafterdesignated the upper and lower ejector-members, respectively. The lowerejector-111cm ber comprises an arm 21 fixed to the rockshaft 17, and afinger 29. which is curved 3 concentrically with the axis of the shaft17.

This finger is adapted to be projected upwardly through the die 14 bythe rocking movement of the rock-shaft, and its extremity moves in acurved path, whereby the finger first engages the lower surface of ablank, and then raises the blank and forces lit upwardly and alsooutwardly from the 1 die, as shown in Figs. 4 and 5.

vertical section on the broken line. 8-3 in I The operation of the lowerejector-1nem her, as just described, is nearly similar to the operationof the ejector in the said patent, but in the patented machine thedischarge of the blank fromthe ejector is controlled solely by theaction of gravity, dependence being placed upon the inclined finalposition of the end of the ejector to insure that the blanks shall bedischarged laterally, and not fall back upon the die. In the presentconstruction, however, 1 control the movements of the blank positivelyuntil the lower ejector-member has reached a position from which it isimpossible for the blank to fall back upon the die. This is accomplishedby the use of the upper ejector-member, which comprises an arm 23carrying a laterally-projecting finger 24, of

"which the extremity registers with the extremity of the finger 22 ofthe lower memher. The arm 28 is fixed upon a rock-shaft 25, which isournaled upon the frame of the machine in alinement with the rockshaft17, so that the two members may swing about the same axis. A spring 26is coiled about the shaft 25, and connected, at one end, to the frame ofthe machine, and at the other end to a collar 27 fixed on this shaft.This spring tends constantly to swing the upper ejector-member towardthe lower member, and in the normal position of the upper member itrests horizontally just above the upper surface of the die, as shown inFig. 3. This figure shows also the normal position of the lowerejector-member. Upon the arrival, between the ejectormcmbers, of a diecarrying a blank upon which the compressin operation has been performed,the shaft 1 is rocked by the eccentric-mechanism, so that the lowerejectormember swings upwardly through the die, thus engaging and raisingthe blank 12.- This movement brings the blank into engagement with theupper ejector-member, and during the continued movement of the lowermember the upper member is held forcibly against the blank, but yieldsto the movement of the lower member and the blank, thus clasping theblank securely until the parts reach the extreme position shown in Fig.4, wherein the blank has been carried so far to one side of the die thatupon its release it cannot fall back in or upon the die. When the upperejector-member reaches this position it'is momentarily retained thereinby a detent 28. This detent, as shown in the drawings, is in the form ofan arm secured to the hub of the arm 23 by means of two studs 29 and 30,which pass loosely through openings in the detent. A spring 31, coiledabout the stud 30, tends to hold the detent in the position shown inFig. 1. A beveled lug 32 is so positioned on one of the brackets 33, onwhich the shaft 17 is journaled, that during the ejecting operation thedetent rides over and then snaps into position beneath this lug, asshown in Fig. 4. Accordingly, at the commencement of the return-movementof the lower ejector-member the upper member is retained in the positionof Fig. 4:, so that it cannot follow the lower member. The blank is thusreleased and permitted to fall by gravity, as shown in Fig. 5.

The release of the upper ejector-member is caused automatically by thereturn-movement of the lower-member. To this end the arm 21 is providedwith a beveled surface 34 adapted to cooperate with the detent. When thelower ejector-member reaches the posi- Gopies of this patent may beobtained for five cents each, by addressing the Washington, D. G.

tion of Fig. 5, in its return-movement, this beveled surface forces thedetent outwardly, thus disengaging it from the lug 32, and thereupon thespring 26 at once rocks the shaft 25 and the upper ejector-member backto the normal position of Fig. 3, and the parts are thus ready foroperation upon the next blank to be brought between them.

l/Vhile my invention has been described as applicable to a machineadapted for the particular purpose of compressing top-lifts, it will beunderstood that it is applicable to machines for various other purposes,and that, in general, it is not limited to the embodiment thereofhereinbefore described and illustrated in the accompanying drawings.

I claim 1. An ejector for a press of the type in which flat blanks arecompressed, in horizontal position, in a die open at top and bottom; theejector comprising an upper member and a lower member adapted to engagethe respective surfaces of a blank in the die and movable in a directionto raise the blank from the die and carry it to one side thereof, andmechanism, for actuating and controlling said ejectonmembers, adapted tocause movement thereof in unison during the ejecting operation buttocause a separation of said members, after the ejecting operation andbefore the return of the lower member to normal position, whereby theblank is released while at one side of the die. V V

2. An ejector for a press of the type in which blanks are compressed ina die open at opposite faces; the ejector comprising two members adaptedto engage opposite surfaces of a blank while in the die, and'movable,substantially about a common axis, in

a direction to discharge the blank from the die; mechanism for movingone ejectormember in said direction; a spring tending to move the secondejector member in the opposite direction; and detent-mechanismcooperating with both ejector-members and adapted to retain the secondmember against return-movement during, the first part of thereturn-movement of the first ejectormember, and then to release thesecond member and permit it to be returned by said spring. 7

. MICHAEL W. OBRIEN. Witnesses: FARNUM F. DORSEY, D. GURNEE.

Commissioner of Patents,

